PMA COMPREHENSIVE STUDY GUIDE 2026
FULLY SOLVED QUESTION SET
◉biodiversity. Answer: the diversity of plant and animal life in a
particular habitat (or in the world as a whole)
◉invasive species. Answer: species that enter new ecosystems and
multiply, harming native species and their habitats
◉aquatic ecosystem. Answer: an ecosystem in a body of water
◉carrying capacity. Answer: the number of organisms that a region
can support without the population collapsing
◉climate change. Answer: a change in global or regional climate
(temperature and precipitation) patterns
◉depth. Answer: distance from the top or surface of something to its
bottom
◉emigration. Answer: the act of leaving one's own habitat to settle
permanently in another
, ◉exponential growth. Answer: dramatic increase in population over
a short period of time; also known as a J-shaped curve
◉immigration. Answer: the action of coming to live permanently
from another area
◉limiting factor. Answer: something that will limit the size of a
population; ex: food, shelter, mates, etc.
◉logistic growth. Answer: occurs when the growth rate decreases as
the population reaches carrying capacity; also known as an s-shaped
curve
◉native species. Answer: not invasive, a species that occurs
naturally in an area or habitat
◉pH. Answer: the level of acidity
◉salinity. Answer: the level of salt in a body of water
◉density-independent limiting factor. Answer: limiting factor that
affects all populations in similar ways, regardless of population size;
ex: natural disasters
FULLY SOLVED QUESTION SET
◉biodiversity. Answer: the diversity of plant and animal life in a
particular habitat (or in the world as a whole)
◉invasive species. Answer: species that enter new ecosystems and
multiply, harming native species and their habitats
◉aquatic ecosystem. Answer: an ecosystem in a body of water
◉carrying capacity. Answer: the number of organisms that a region
can support without the population collapsing
◉climate change. Answer: a change in global or regional climate
(temperature and precipitation) patterns
◉depth. Answer: distance from the top or surface of something to its
bottom
◉emigration. Answer: the act of leaving one's own habitat to settle
permanently in another
, ◉exponential growth. Answer: dramatic increase in population over
a short period of time; also known as a J-shaped curve
◉immigration. Answer: the action of coming to live permanently
from another area
◉limiting factor. Answer: something that will limit the size of a
population; ex: food, shelter, mates, etc.
◉logistic growth. Answer: occurs when the growth rate decreases as
the population reaches carrying capacity; also known as an s-shaped
curve
◉native species. Answer: not invasive, a species that occurs
naturally in an area or habitat
◉pH. Answer: the level of acidity
◉salinity. Answer: the level of salt in a body of water
◉density-independent limiting factor. Answer: limiting factor that
affects all populations in similar ways, regardless of population size;
ex: natural disasters
